ACPI: Remove unused lockable in acpi_device_flags

Removed lockable in struct acpi_device_flags since it is no
longer used by any code. acpi_bus_hot_remove_device() cannot
use this flag because acpi_bus_trim() frees up its acpi_device
object. Furthermore, the dock driver calls _LCK method without
using this lockable flag.
Signed-off-by: NToshi Kani <toshi.kani@hp.com>
Reviewed-by: NYasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/scan.c

@@ -1017,11 +1017,6 @@ static int acpi_bus_get_flags(struct acpi_device *device)
 			device->flags.ejectable = 1;
 	}
 
-	/* Presence of _LCK indicates 'lockable' */
-	status = acpi_get_handle(device->handle, "_LCK", &temp);
-	if (ACPI_SUCCESS(status))
-		device->flags.lockable = 1;
-
 	/* Power resources cannot be power manageable. */
 	if (device->device_type == ACPI_BUS_TYPE_POWER)
 		return 0;

include/acpi/acpi_bus.h

@@ -144,12 +144,11 @@ struct acpi_device_flags {
 	u32 bus_address:1;
 	u32 removable:1;
 	u32 ejectable:1;
-	u32 lockable:1;
 	u32 suprise_removal_ok:1;
 	u32 power_manageable:1;
 	u32 performance_manageable:1;
 	u32 eject_pending:1;
-	u32 reserved:23;
+	u32 reserved:24;
 };
 
 /* File System */